MPLS Guide Label Distribution Protocol
3HE 18686 AAAB TQZZA © 2022 Nokia.
Use subject to Terms available at: www.nokia.com
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• Services Using SDP with an LDP IPv6 FEC
• Mirror Services
• OAM Support with LDP IPv6
• Interoperability
• Upgrading from IPv4 to IPv6
5.4.1 Link LDP
LDP IPv6 uses a 128-bit LSR ID as defined in draft- pdutta-mpls-ldp-v2-00. See LDP
Process Overview for more information about interoperability of this implementation
with a 32-bit LSR ID, as defined in draft-ietf- mpls-ldp-ipv6-14.
A Hello adjacency is brought up using a link Hello packet with a source IP address
set to the interface link local unicast address and a destination IP address set to the
link local multicast address FF02:0:0:0:0:0:0:2.
The transport address for the TCP connection, which is encoded in the Hello packet,
is set by default to the LSR ID of the LSR. The transport address is instead set to the
interface IPv6 address if the user enables the interface option in one of the following
contexts:
• config>router>ldp>if-params>ipv6>transport-address
• config>router>ldp>if-params>if>ipv6>transport-address
The user can configure the local-lsr-id option on the interface and change the value
of the LSR ID to either the local interface or to another interface name, including
loopback. The global unicast IPv6 address corresponding to the primary IPv6
address of the interface is used as the LSR ID. If the interface does not have a global
unicast IPv6 address in the configuration of the transport address or the configuration
of the local-lsr-id option, the session does not come up and an error message is
displayed.
The LSR with the highest transport address will bootstrap the IPv6 TCP connection
and IPv6 LDP session.
The source and destination addresses of LDP/TCP session packets are the IPv6
transport addresses.
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